A woman has been found dead in a reserve tank of their house in capital's Gudaraghat area under Shah Ali police station in Mirpur.
Police recovered the body of Bristy, 22, from the tank around 12:30am Monday.
Shah Ali police station SI Abdul Halim said the woman's husband Mohiruddin and five others were held in connection with the incident.
The body was sent to Dhaka Medical College Hospital for autopsy, he added.